rpc.c File Reference

#include <sys/types.h>
#include <stddef.h>
#include "tasking.h"
#include "rpc.h"
#include "pmem.h"
#include "cpu/paging.h"
#include "cpu/arch_consts.h"
#include "kmalloc.h"
#include <string.h>
#include "cpu/serial.h"

Data Structures
struct	rpc_waiting_thread

Functions
static void	mark_init (pid_t pid)
static void	clear_init (pid_t pid)
static char	is_init (pid_t pid)
void *	kernel_rpc_call (pid_t pid, char *name, void *buf, size_t size)
void	kernel_rpc_register_func (char *name, rpc_func code)
void	kernel_rpc_deallocate_buf (void *buf, size_t size)
void	kernel_rpc_return (void *buf, size_t size)
size_t	kernel_get_num_rpc_funcs (pid_t pid)
void	kernel_rpc_mark_as_init ()

Variables
rpc_func_info *	process_funcs [32768] ={NULL}
	Pointers to a list of registered functions for each process.
size_t	process_num_funcs [32768] ={0}
	The number of functions each process has registered.
char	process_ready_bmap [32768/8] ={0}
	A bitmap of processes that have completed RPC init.
rpc_waiting_thread *	waiting_thread_list =NULL
	A linked list of threads waiting for a process to finish RPC init.

Function Documentation

clear_init()

static void clear_init ( pid_t  pid )

static

Mark a process as not ready to accept RPC calls

Parameters

pid	The pid to mark

is_init()

static char is_init ( pid_t  pid )

static

Check if a process is ready to accept RPC calls

Parameters

pid	The pid to check

Returns

whether the process is ready

kernel_get_num_rpc_funcs()

size_t kernel_get_num_rpc_funcs

(

pid_t

pid

)

Get the number of RPC functions a process has registers

Parameters

pid	The PID of the process

Returns

the number of RPC functions the process has registered

kernel_rpc_call()

void* kernel_rpc_call	(	pid_t	pid,
		char *	name,
		void *	buf,
		size_t	size
	)

Call an RPC function

Parameters

pid	The PID of the process with the RPC function
name	The name of the function to call
buf	The argument buffer to provide
size	The size of the argument buffer

Returns

the return buffer of the RPC functiom

kernel_rpc_deallocate_buf()

void kernel_rpc_deallocate_buf	(	void *	buf,
		size_t	size
	)

Deallocate an RPC return buffer

Parameters

buf	The buffer to deallocate
size	The size of the buffer to deallocate

kernel_rpc_mark_as_init()

void kernel_rpc_mark_as_init

(

)

Mark the current process as ready to accept RPC calls

kernel_rpc_register_func()

void kernel_rpc_register_func	(	char *	name,
		rpc_func	code
	)

Register an RPC function

Parameters

name	The name of the function
code	The code of the function

kernel_rpc_return()

void kernel_rpc_return	(	void *	buf,
		size_t	size
	)

Set the RPC return buffer for the calling thread & unblock the calling thread

Parameters

buf	The return buffer
size	The size of the return buffer

Note

This function must only be called from an RPC thread

mark_init()

static void mark_init ( pid_t  pid )

static

Mark a process as ready to accept RPC calls

Parameters

pid	The pid to mark